How long after park close is package pickup open?

[Mississippianna]

I know you can linger after park closing, so how long after closing is the package pickup window open? I'm specifically thinking of Epcot. I'm planning a day of wandering and shopping, then maybe taking our time to leave after Illuminations to avoid the crush of people at the buses. Will we be able to take a leisurely exit if we have purchases waiting at the front of the park to be picked up? (They do still do this, right?)